I kinda wish there was someway to link something like Geekatoo with your stackexchange reputation. So if a person on Geekatoo had a high rep on superuser? I might be more tempted to go with them.
I guess what I am saying is that we need some kind of standardized Internet wide reputation system.

To understand this story, you need to understand that grandchildren are like crack cocaine to grandparents. I'm convinced that if our parents could somehow snort our children up their noses to get a bigger fix, they would. And when your parents live out of state, like ours do, access to the Int...

@Jeff,
Any chance you will consider adding authentication via a X.509 certificate as an additional option on stackexchange? It sure seems like this should be pretty easy to implement. It seems like it should be as useful for proving the identity of someone as trusting 3rd party identity providers, or cookie based authentication. You already support multiple authentication providers adding another should be easy.
Just setup a page, which requires a certificate. If you have never seen the public certificate before, ask the user if they wish to associate the certificate with an existing account or create a new one, store the certificate for future logins. If you have seen the public cert before, then look up the account details and log the user in.
I would suggest that you should not care about what CA the certificate is signed by. Just accept any certificate signed by any CA, or self-signed. If you don't spend time trying to verify anything to do with CAs, certificate based auth basically just becomes trust on first use.

Perhaps you've seen this recent XKCD about password choice? It prompted a spirited debate – even on our very own Security Stack Exchange – about the merits of the argument presented there. Now, to be clear, I'm completely on Randall's side here; I'm all for passphrases over passwords, and I...